Circuit Description
The instrument cluster calibrations are stored in the Electronically Erasable Programmable Read Only Memory (EEPROM). When the ignition switch is first turned to the on position, the instrument cluster performs internal tests on the EEPROM and can determine the integrity of its non-volatile memory. It is in the EEPROM where information concerning the instrument cluster configuration is stored. Information such as car model, point of sale, manufacturer, odometer mileage and fuel tank capacity are listed here. These configurations are what will determine how the instrument cluster will interpolate data sent from other systems within the vehicle.
Conditions for Setting the DTC
| • | The instrument cluster has three consecutive unsuccessful attempts at writing to its own non-volatile memory. |
| • | Internal memory malfunction (write error) is detected by the instrument cluster. |
| • | Condition must occur when ignition is first turned on. |
Action Taken When the DTC Sets
| • | The instrument cluster stores DTC B0600 in memory. |
| • | The SERVICE VEHICLE SOON indicator turns on. |
Conditions for Clearing the DTC
| • | Under all fault conditions, the ignition switch must be cycled from on to off, back to on before this DTC can change form current to history. |
| • | A history DTC will clear after 100 drive cycles if the condition for this DTC is no longer present. |
| • | Using a scan tool. |
Diagnostic Aids
Since the EEPROM is not removable from the instrument cluster and DTC B0600 is an internal malfunction to the instrument cluster, no repair procedure exists for this malfunction and the instrument cluster will need to be replaced.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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Always perform the instrument cluster diagnostic system check before attempting to diagnose this DTC.
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This diagnostic procedure requires using a scan tool.
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This repair procedure requires instrument cluster replacement.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Was the instrument cluster diagnostic system check performed? | -- | Go to Step 2 | ||
Using a scan tool clear the instrument cluster DTC and recheck for DTC B0600. Does DTC B0600 reset? | -- | Go to Step 3 | Go to A Powertrain On Board Diagnostic (OBD) System Check (RPO 3.5L) or A Powertrain On Board Diagnostic (OBD) System Check (RPO 3.8L) | |
Replace the instrument cluster. Refer to Instrument Cluster Replacement for service procedure. Is the repair complete? | -- | System OK |
